Amazon may adjust a bid in real time up to 100% when an ad may be more likely to convert to a sale, and lower a bid when less likely to convert to a sale. What is this describing?

Dynamic bids - up and down describes Amazon's real-time bid adjustment strategy where bids can be increased (up to 100%) when a conversion is highly probable and decreased when a conversion is less likely. This aims to maximize sales while optimizing ad spend. "Dynamic bids - down only" would only decrease bids, not increase them for high-potential conversions. "Automated bidding" is a broader term that encompasses various strategies, but "dynamic bids - up and down" specifically defines this particular real-time adjustment. "Fixed bids" would mean no real-time adjustments are made, which contradicts the scenario described.